<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            background-color: pink;
            height: 200px;
            display: none;
            margin-bottom: 10px;
        }
    </style>
    <script type="text/javascript" src="jquery-1.11.1.min.js"></script>
    <script>
        $(document).ready(function(){
            $("#btnShow").click(function(){
                $("div").show(1000);
            })

            $("#btnset").click(function(){
                $("div").html("我是内容");
            })
        })
    </script>
</head>
<body>
<input type="button" value="设置内容" id="btnset">
<input type="button" value="显示DIV " id="btnShow">
<div></div>
<div></div>
<div></div>
</body>
</html>